Hydrothermally stable Ru/HZSM-5-catalyzed selective hydrogenolysis of   lignin-derived substituted phenols to bio-arenes in water

doi:10.1039/c6gc01971d

CORC > 北京大学 > 化学与分子工程学院

	Hydrothermally stable Ru/HZSM-5-catalyzed selective hydrogenolysis of lignin-derived substituted phenols to bio-arenes in water
	Luo, Zhicheng ; Zheng, Zhaoxia ; Wang, Yuechao ; Sun, Geng ; Jiang, Hong ; Zhao, Chen
刊名	GREEN CHEMISTRY
	2016
关键词	PHASE HYDRODEOXYGENATION CATALYZED HYDRODEOXYGENATION GUAIACOL HYDRODEOXYGENATION BIFUNCTIONAL CATALYSTS AROMATIC-HYDROCARBONS HIGHLY EFFICIENT METAL-CATALYSTS MODEL COMPOUNDS ACID SITES LIMONENE
DOI	10.1039/c6gc01971d
英文摘要	In the context of arenes generated from bioresources, a hydrothermally stable catalyst Ru/HZSM-5 is reported for the quantitative conversion of lignin-derived phenol, anisole, guaiacols, and syringols into bioaromatic hydrocarbons in a one-pot aqueous-phase process in moderate conditions (240 degrees C, 2 bar H-2), with a high carbon balance of 98.6%. The selective hydrodeoxygenation reaction pathway from guaiacol proceeded via an initial hydrogenolysis route to phenol with a rate of 33 mmol g(-1) h(-1), and subsequently phenol was directly hydrogenolyzed to benzene at a rate of 10 mmol g(-1) h(-1) over Ru/HZSM-5 in selected conditions. Moreover, routes via the hydrogenation of guaiacol, as well as the hydrogenolysis of catechol and anisole, have been rationally excluded via comparative kinetic studies of the individual steps of the hydrodeoxygenation of catechol, anisole, and phenol over Ru/HZSM-5 in identical conditions. The selective cleavage of guaiacol at the C-O position of the C-sp3-OAr group is influenced by space hindrance and the environment of the reactant (gas phase, liquid phase, or acidic aqueous phase). In the condensed liquid phase and gas phase, catechol rather than phenol is formed as the major product from guaiacol over Ru/HZSM-5. However, in the highly diluted aqueous phase, phenol alone (without detected catechol) is formed as the dominant product. In addition, the pathway for guaiacol conversion is sensitive to the hydrogen pressure and temperature, which demonstrates that a relatively high temperature and a low hydrogen pressure are crucial for manipulating the coupled tandem hydrogenolysis routes. Among various oxide-loaded Ru catalysts, Ru/HZSM-5 has been confirmed to be the most efficient catalyst for the target selective hydrodeoxygenation of guaiacol, and the metal sites and support were found to be highly stable for four successive catalytic runs in the near-critical aqueous phase that was used.; Recruitment Program of Global Young Experts in China; National Natural Science Foundation of China [21573075]; Shanghai Pujiang Program [PJ1403500]; Foundation of Key Laboratory of Low-Carbon Conversion Science Engineering; Shanghai Advanced Research Institute; Chinese Academy of Sciences; Key Research and Development Program of the Ministry of Science and Technology [2016YFB0701103]; SCI(E); ARTICLE; h.jiang@pku.edu.cn; czhao@chem.ecnu.edu.cn; 21; 5845-5858; 18
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/459204]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Luo, Zhicheng,Zheng, Zhaoxia,Wang, Yuechao,et al. Hydrothermally stable Ru/HZSM-5-catalyzed selective hydrogenolysis of lignin-derived substituted phenols to bio-arenes in water[J]. GREEN CHEMISTRY,2016.
APA	Luo, Zhicheng,Zheng, Zhaoxia,Wang, Yuechao,Sun, Geng,Jiang, Hong,&Zhao, Chen.(2016).Hydrothermally stable Ru/HZSM-5-catalyzed selective hydrogenolysis of lignin-derived substituted phenols to bio-arenes in water.GREEN CHEMISTRY.
MLA	Luo, Zhicheng,et al."Hydrothermally stable Ru/HZSM-5-catalyzed selective hydrogenolysis of lignin-derived substituted phenols to bio-arenes in water".GREEN CHEMISTRY (2016).